Solar Power Project
Limoneira Solar Project
Limoneira Company has installed Limoneira Solar in Santa Paula.
Detailed description from Limoneira after the pictures…
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Wind Generators
What Are the Benefits of Wind Generators?
Executive Summary about Wind Generators by Gallen Ho
You may have noticed that there are more wind generators out there now than ever before. You can easy find a professional contractor with the experience to install home wind generators. You can even buy a wind generator kit that allows you to build it from the pieces it comes with. This is a great way to get the benefits from wind generators for the lowest possible price.
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Solar Energy Applications
Solar energy technologies use energy from the sun to produce heat, light, hot water, electricity, and even cooling, for homes, commercial and industrial.
There are a variety of technological applications that have been developed to take advantage of solar energy. Technology can be read further below.
Photovoltaics System
Solar cells work by converting sunlight directly into electricity. The electrons in the semiconductor material, the material used to capture sunlight, will move when the sun’s energy in the form of photons hit it. Solar energy is forcing the electrons to move, occur continuously, and consequently there is also a continuous electricity production. Process, which turns sunlight (photons) into electricity (voltage), called the photovoltaic effect.
Solar Cell Module
Solar cells are usually organized into modules that each module can consist of 40 solar cells. Some modules can be arranged to form a PV line fitted with a fixed angle facing south. Or even could be placed in a sun-tracking device, to get more solar energy throughout the day. Several rows of PV could produce enough power for a house. As for industrial applications or power companies, hundreds of lines of PV can be linked to form one large PV systems and sufficient to meet the electricity needs.
Thin Film Solar Cell
Thin film solar cells use several layers of semiconductor material with a thickness in the micrometer scale. Technology allows to create solar cells integrated into rooftops to the skylights. Even solar cells are designed for applications having the same power with actual roof.
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Solar Thermal Power Plant from Google
In recent years, Google invest in green energy sector seriously. More than US$ 250 million invested by this company and there is no clear information about why the company’s biggest search engine in the world invest in this sector in addition to its commitment to encourage and develop green energy more quickly.
Google company may not only “simply” investing. The company has a team that is able to analyze and predict the future of this sector.
This time Google reinvest US$ 168 million in a solar thermal power plant located in the Mojave Desert, southeastern California, USA.
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Solar Powered Tree by Tourism London
In an effort to reduce the amount of grid electricity used in their offices, Tourism London has announced the world’s tallest solar powered tree that will be able to produce about 8.6KW of power. Electricity generated will provide income to pay for the project during the contract period. It was designed to be a visual landmark to highlight the importance of clean, renewable energy and features three pole mounted array of photovoltaic modules. It stands at seven meters tall and has 27 leaves. The whole project aims to produce 10,000 kWh of electricity every year, which is about half of what’s taking office each year, and will also help offset about 10 tons of CO2 per year from coal-fired power plants.
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Solight by Lee Ju Won
Sometimes the plants we have in our apartment might be a little trouble getting enough sunlight. Thus, the Solight concept may resolve the problem. This device is able to store solar energy through the internal battery, after which it will be able to be placed on top of the plants, provides a healthy dose of natural sunlight.
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“Sundew Flower Trap” by Min-Kyu Choi
“Sundew Flower Trap” by UK based designer Min-Kyu Choi is a flower pot like device that helps to kill the insects, like mosquitoes with an environmentally friendly manner. How? Well, it’s carnivorous plant with ‘Sundew Flower Trap’ is inserted and ultraviolet light which will help attract insects near the plant and when they arrived, they were trapped.
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Top 5 World’s Largest Solar Power Plants
1. Olmedilla Park Solar Power Plant
(in Olmedilla de Alarcón, Spain, 60 MW) Finished in September 2008. This power plant uses 162,000 average photovoltaic solar panel to deliver 60 MW of electricity on a sunny day. The whole factory was completed in 15 months at a cost of about 530 million U.S. dollars current exchange rate. Olmedilla built with conventional solar panels, which are made with silicon and tend to heavy and expensive.
2. Puertollano Park Solar Power Plant
(Spain, 50 MW) in 2008 Renovalia develop the power station in Puertollano, Ciudad Real, residential energy parks with an installed capacity of 50 megawatts (MW). The power generated here is equivalent to the annual domestic consumption of electricity of about 39,000 households. The energy produced here will replace the theoretical disposal 84,000 tons CO2/year or 2.1 million tons of CO2 over 25 years during the production.
3. Moura Solar Power Station
(Portugal, 46 MW) Completed December 2008. This solar power plant is placed in the municipality of Moura, Alentejo, Portugal, one of the sunniest areas in Europe and besides one of the most economically depressed. The construction involves two stages, first with a built in 13 months and completed in 2008, and the rest will be completed in 2010, with a total cost of € 250 million for the project. The power plant will have an installed capacity of 46 mwp, by more than 376,000 solar panels. Nearly 190,000 panels (32 MW) installed in permanent structures, 52,000 (10 MW) in a single-axis trackers, which follow the sun in the sky, and further 20 MW of power capacity will be added during phase 2 project. This will occupy an area of 320 hectares (130 acres), producing 88 GWh of electricity per year.
4. Waldpolenz Solar Park
(Germany, 40 MW) 550,000 First Solar thin-film CdTe modules. Completed in December 2008 Waldpolenz Solar Park, which is the world’s largest thin-film photovoltaic (PV) power system, built at a military air base east of Leipzig in Germany. The power plant 40-megawatt solar power system using state-of-the-art thin film technology. 550,000 First Solar thin film modules are used, which supplies 40,000 MWh of electricity per year. The investment costs for solar parks Waldpolenz Euro 130 million.
5. Arnedo Solar Plant
(Spain, 36 MW). Completed in October 2008, power plant that produces 34 GWh per year, which would own 12,000 households and prevent 375,000 tons of CO2. Facilities in seven acres and 172,000 panels houses. Project budget of about € 180,000,000. La Rioja, a region of Spain known for its wine, already covers 62% of electricity with enhanced resources.
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What Is So Fascinating About Solar Pump
Solar-powered water pumps are an effective alternative to conventional gas or electric pumps. Modern pumps are powered by solar energy effectively in the world, including India, where they are often used for irrigation and drinking water.
The main advantage of solar pumps is that they work for free. A solar array connected to the pumping mechanism gains all the required power from simple sunshine. This also means that the system independently. There is no need for complicated wiring for the electricity and outside fuel is not needed.
The amount of pollution caused by the use of conventional pump has also completely eliminated. This is a big advantage, especially when used for irrigation on the farms where pollution can possible on site damage. Keeping the fossil fuels from the equation for the pumping of water will reduce potential contamination. In addition, the use of solar energy offers many benefits for agriculture, the farmers, for example, a solar pump used in an area of low-lying, which often flooded or to move the water used to feed animals and plants.
For any system of water pump, both large and small, the installation of solar systems is one of the easiest and most profitable. No long procedures for determining the wiring of the solar panels, and there is no need for extra fuel. Many of these systems, also the digital monitoring and control instruments adding for convenience.
Worldwide, the solar energy is one of the best ways of powering pump instrument. Simple installation, low maintenance, and reducing pollution are just some of the many benefits.
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What Does Solar Cell Mean?
You may have seen a calculator that has a solar cell? calculator that does not need batteries, and in some cases do not even have the off button. As long as you have enough light, so the calculator can be on at any time and forever. You may have seen larger solar panels, such as in housing or traffic lights, haven’t you? In this article I will review how solar cell work so it can deliver the energy and drive an electronic device.
Today the demand for electricity has become a major requirement in all corners. The presence of power plants sometimes do not solve the need for electricity especially in remote areas where the terrain is always an excuse. Here an alternative energy that can be easily found in nature and can be used as an alternative free energy replacing conventional electricity, because it can turn on household electronics such as televisions, radios and lights.
Solar cells made from pieces of a very small silicon coated with special chemicals to form the basis of solar cells. Solar cells generally have a minimum thickness of 0.3 mm is made from semiconductor materials incision with positive and negative poles. Each solar cell produces usually voltage 0.5 volts. Solar cells is an active element (semiconductor) that utilizes photovoltaic effect to transform solar energy into electrical energy.
Solar cells contain a connection (junction) between two thin layers made of semiconductor materials, each of which is known as a semiconductor type “P” (positive) and semiconductor type “N” (negative).
N-type semiconductor made of silicon crystals and there are also some other materials (typically phosphorus) within the limits that these materials can provide an excess of free electrons.
Electrons are sub atomic particles are negatively charged, so that the silicon alloy in this case known as N-type semiconductor (Negative). P-type semiconductor made of silicon crystal in which there is a small amount of other material (typically boron) which caused the shortage of material free electrons. Lack or loss of electrons is called a hole. Because there is no or lack of electrons electrically negative charged then the silicon alloys in this case as a semiconductor type-P (Positive).
Composition of a solar cell, the same as a diode, consisting of two layers, called PN junction. PN junction obtained by staining a pure semiconductor silicon (valence 4) with the impurity valence 3 on the left side, and one on the right impurity stained with valence 5.
The effect of the electric field in a PV cell
Operation of a PV cell
Basic structure of a generic silicon PV cell
Thus formed on the left side that is not pure silicon again and called P type silicon, while the right side is called silicon type N. In the pure silicon there are two kinds of electrical charge carriers are balanced. Positive electric charge carriers called holes, while the negative are called electrons. After a desecration process, in the P type silicon formed holes (positive charge carriers) in a very large number compared with the electron. Therefore, in the P type silicon holes are majority charge carriers, while the electrons are minority carriers. Conversely, in the N type silicon is formed of electrons in a very large number so-called majority carriers, and holes called minority carriers.
In the silicon rod there was interaction between the P and the N. Therefore called the PN junction. When present, the P associated with the positive pole of a battery, while the negative polar associated with the N, then there is a relationship called “forward bias”.
Under forward bias, electrical currents arise in a series due to both types of charge carriers. So the electric current flowing in the PN junction is caused by the movement of electron and the movement of holes. An electric current is flowing in the direction of holes movement, but opposite direction with the movement of electrons. Just to further explain, electrons moving in the conductor material can lead to electrical energy. And electrical energy is called as an electric current that flows in the opposite direction to the movement of electrons.
But, if the P associated with negative pole of batteries and the N associated with positive pole, then now formed a relationship called “reverse bias”. In these circumstances, the hole (positive charge carriers) can be connected directly to the positive pole, while the electrons are also directly to the positive pole. So, clearly in the PN junction there is no movement of majority charge carriers either the holes or electrons. Meanwhile, the minority charge carriers (electrons) in the part P moves trying to reach the positive pole of the batteries. Similarly, the minority charge carriers (holes) in the N also moved to reach the negative pole. Therefore, in a state of reverse bias, in the PN junction there is also output current even in very small amounts (micro amperes). This current is often called the reverse saturation current or leakage current.
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Anything interesting in reverse bias. When the temperature of PN junction raised they will be able to enlarge leakage current. Means that if given the energy (heat), the minority charge carriers in the PN junction grows. Because the light is one form of energy, so if there is light that hit a PN junction may also produce enough energy to generate charge carriers. This symptoms are called photoconductive. Based on the photoconductive symptoms made of photodiode electronic components from PN junction.
In reverse bias, with increasing intensity of light that hit photodiode can increase the level of leakage current. Leakage currents can also be enlarged by increasing the battery voltage (reverse voltage), but the addition of leakage currents were not significant. When the batteries in the reverse bias circuit is removed and replaced with a load of resistance, the provision of light that can cause charge carriers both holes and electrons. If the illumination light is increased, current output was greater. Such symptoms are called photovoltaic. Light can provide enough energy to enlarge the number of holes in the P and the number of electrons on the N. Based on the symptoms of this photovoltaic electronic components can be created photovoltaic cell. Because usually the sun as a source of light, the photovoltaic cell is also called the solar cell (solar cells) or a solar energy converter.
So the solar cell is essentially a large photo diode and designed by referring to the photovoltaic symptoms so that could produce the greatest possible power. P type silicon is the very thin surface layer so that light can penetrate directly reach the junction. Part P is given ring-shaped nickel layer, as a positive output terminal. Under the P is the N type that is coated with nickel as well as the negative output terminal.
To obtain a large enough power required much of solar cells. Usually, solar cells arranged form the shape of the panel, and is called the photovoltaic panels (PV). PV as a source of electric power was first used in satellites. Then PV as an energy source for cars, so there are solar electric car. Now, in foreign countries, PV has started to be used as a roof or wall of the house. Sanyo has made even a semi-transparent PV that can be used as a substitute for glass.
After getting the output of the solar cell is a direct electrical current can be used to load utilized. But also the electric current can be used as a charge stored by the battery to be used when needed, especially at night because there was no sun.
If the solar cell is used for storage into the battery, then the resulting voltage magnitude must be above the battery specification. For example the battery used is 12 volts, the voltage produced by solar cell must be above 12 volts in order to perform charging.
We recommend that before carrying out the charging battery should be empty because the incoming flow will be filled with the maximum. The unit capacity of a battery is the Ampere-hour (Ah) and these characteristics are usually found on the label of a battery. For example a battery with 10 Ah capacity will fill up for 10 hours with the solar cell output currents of 1 Ampere.
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Grid-connected System
Grid-connected system was applied to many urban areas housing, existing electricity network. The purpose of using solar panels, to save the cost of excessive electricity consumption and help reduce the greenhouse effect caused by the use of fossil fuels which cause excessive air pollution. Electrical energy which is in turn, channeled into the electricity networks that already exist and can be stored in the electricity network. This term is called the Hybrid System, which combine solar power plants with electricity network. Solar systems can also be combined with other power plants such as PV-Generator Hybrid, Hybrid PV-Microhydro, Hybrid PV-Wind and can even be combined into 3 systems of different power to Hybrid PV-Wind-Generator.
The following illustration application of grid connected systems in housing
Caption:
1. Solar panels installed at suitable locations to generate optimal power.
2. Inverter (Controller) function to change direct current (DC) produced by PV into alternating current (AC) that can be applied to household electronic equipment.
3. Box distribution function to distribute the AC current through the PV generated electricity network.
4. Discharging the burden of household air-conditioning system.
5. Electric meter show the current of electricity network will b
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The Basic Facts Of Solar Battery
Solar power is an effective way to harness the power of the sun, the plants have been doing this for millions of years. Solar energy is cheap, reliable and can produce tremendous power, but only in the daytime. This is the main problem of solar energy utilization. The average home will use less power during the day, and much smaller in the summer which is the peak power (fastest time) for solar panels to generate energy. To be effective this power should be stored.
One popular way to store solar power is to connect the solar panels to the electrical grid, which effectively turn it into a battery. This allows excess energy to be sent back to the electric company, actually make the electric meter run backwards. At night, the power drawn from the grid as usual. This is only as reliable as the existing grid. Each power outages could still affect these solar panels, but no rechargeable batteries should be used.
Rechargeable batteries are known for having a short age, and expensive. They also have low power flow for a long time with good capacity, or they have a high power electrical short time with the poor capacity. Typical batteries, especially lithium ion, has a high capacity to store power, but provides a weak output and recharge slowly. An ideal solar battery will be able to charge quickly, has a high density to save power and can emit as much power as needed. This ideal combination is something that no battery has been able to do until now. It can only be done through the study of nanotechnology.
Researchers at the University of Maryland have developed a way to create a very powerful battery, the dense refill using nanotechnology. Individual parts, which looks surprisingly like a photovoltaic panel is only a thousand times smaller, is assembling his own, self-replication, and aligning itself too. There is no mechanical process can achieve anything similar small, which also contributes to their relatively low cost. They are still in the testing stage and court, but should look widely and production operations in a year. Able to store the power created from sun and wind will soon make fossil fuels obsolete and mysterious.
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Home Solar Panels
Executive Summary about Home Solar Panels by Valt Jones
Home solar panels are the desirable solution for anyone willing to substitute the polluting energy created by fuel-supplied energy plants with green and renewable source of energy. Home solar panels can either turn sunlight into electricity or hot water.
Home solar panels are smaller and inexpensive nowadays, while the rewards have grown exceedingly. Installation of home solar energy systems has become its own licensed specialty performed by licensed home solar contractors. These solar panels are the most consistent source of harvesting energy for residential solar power generation, doing better than the solar cells of previous decades. Marine and RV solar panels and specialty items, such as Powerflex flexible and portable solar panels, are also available.
You will require less home solar panels to collect the necessary energy if the sun is shining often. Home solar panels are generally designed for high voltage grid-connected systems, although they can be used for battery-based systems too. Solar panels that use single crystalline solar cells offer among the record efficiencies obtainable on today’s commercial market.
Home Solar Panels – 5 Benefits of Building a Cheap Solar Power System
Executive Summary about Home Solar Panels by Garry Jones
Earth’s fossil fuel reserves are rapidly diminishing and the price of energy is skyrocketing. More people are turning to free alternative sources of energy and many are finding great success with building home solar panels. In this article we will analyze some of the benefits of building home solar panels.
- Professionally built home solar power systems can cost thousands of dollars.
- With ever increasing utility bills resulting from higher fossil fuel costs the savings from home solar power systems quickly build up.
- Unlike fossil fuel systems home solar panels operate pollution free.
- Many municipalities and States offer incentives in the form of tax credits and rebates to help offset the cost of alternative home energy systems.
- House prices have fallen recently.
Join the tens of thousands of homeowners who are building home solar panels and reaping huge savings on their energy costs. Fossil fuel prices will continue rising, solar power will always be free.
Article You May Be Interested In Reading: Solar Garden Lights
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Solar Batteries – Deep Cycle
Executive Summary about Solar Battery by Michael Motley
Batteries are separated into two categories, by application (what the battery is used for) and construction (how the battery is built). Deep-Cycle batteries are the battery of choice for most installations because of the way they are made. Deep-cycle batteries are made to be run completely down relatively fast, and recharged just as fast, constantly. The major applications for deep-cycle batteries are solar electric (PV), backup power source, and boat/RV batteries.
There are 3 main construction types at this time:
- Flood (wet)
- Gelled
- AGM
Flooded batteries are what most people think of when thinking of batteries of this size.
Gelled Batteries or Gel Cells are sealed, and some are valve regulated. They contain gelled acid that was gelled by adding silica gel, making like a battery acid jelly.
AGM (Absorbed Glass Mat) batteries are similar to the gelled batteries but they also have fiberglass mat between the plates of the batter, which is then filled with gel. These batteries are the premier choice if you have any concerns about spilling of battery acid.
The main difference in deep-cycle batteries is thicker plates. The thicker plates allow the deep-cycle battery to be discharged down as much as 80% over and over again. The battery with the thickest plates will last the longest
A battery cycle is one complete discharge and recharge cycle. How deep a battery is discharged directly affects its life span.
Battery Life
There are many variables to deep-cycle battery life. The standard flooded battery 1-6 years. In the deep-cycle family of batteries, the AGM has one advantage over the other two types in it’s class. There is a myth that you shouldn’t store batteries on concrete floors.
Battery Quick Facts
* Almost all batteries have to be cycled 10-20 times before being able to reach full capacity.
* Always keep vent caps on your flooded batteries when charging.
* Lead-Acid batteries do not have a memory. Use only clean water to clean the outside of batteries.
Solar Battery Technology
Executive Summary about Solar Battery by Anne Clarke
People are realizing that they can easily change the way that power is created. For two centuries the world has relied upon fossil fuel, mostly coal and oil, for almost every form of power. It lights our homes, powers our appliances and drives our cars. Unfortunately fossil fuels rely on combustion to release their power. Solar power is an effective way to harness the power of the sun, something plants have been doing for millions of years. It can produce more power during the day than the average home uses. Most houses will use less power during the day, and much less in the summer which is the peak power producing time for solar panels. To be effective this power must be stored somehow.
One popular way of storing solar power is by connecting the solar panels to the existing electrical grid, effectively turning it into a massive solar battery. At night power is taken from the grid as usual. Any power outages can still affect these solar panel set-ups, but no rechargeable batteries have to be used.
Rechargeable batteries are notoriously short lived and expensive. They either have low power flows for a long time with a good capacity, or they have high power flows for short times with poor capacity. Typical batteries, especially lithium ion, have high capacity for storing power, but deliver a weak output and recharge slowly. The ideal solar battery would be able to charge quickly, have a high density for storing power and be able to emit as much of that power as is needed.
Check out my other guide on Solar Light
